@MustachandaHalf: Your suggestion has a beauty of simplification, which is indeed quit tempting for me. However, I have read many early retirees put aside a big chuck of cash to protect the sequence of returns risks, meaning you don't want to sell your stock shares when stock market crashes right after your retirement (worst-scenario). I understand putting 3 years of living expenses in cash and bond may be too conservative for many people, but it makes me less nervous if a stock market crash happens. See a good article on this:
https://ournextlife.com/2018/02/07/sequence-risk/(They use 70% stock and 30% bond asset allocation, and keep 3 year expenses in cash too.)
I bought intermediate bond and extended market index a few years back before thinking through our FIRE and withdrawal plan. Selling them will trigger long-term capital tax. I plan to use them after bank cash is used up. If the market is down, I can do some rebalance then.
Still trying to figure if I want to invest this cash cushion into savings, CDs, money market or ST/MT bonds.
Fully aware of our 2-person budget may be outrageous for some people. But our healthcare insurance is $1K for two of us per month (from COBRA), and we love travel. There are lots of uncertainty right after FIRE: sold our house and plan to move to California temporally (HCL area). At dust settles down, I am hoping that we can focus more on lowering expenses.